Lighting system

ABSTRACT

A versatile lighting system particularly characterized by a multiplicity of supporting bases, each conforming to a candlelike, truncated, frustoconical configuration surmounted by an interchangeable translucent, flame-shaped tip and including therein a miniature lamp disposed within a universal female receiver of a type particularly adapted to receive miniature lamp bases without regard to their configuration. The system electrically is connected in parallel with a portable source of electrical energy through a universal male connector seated in a receiver so that a plurality of radiating candlelike structures may be readily assembled for use as an ornamental lighting system in decorative schemes, including wall arrangements, centerpieces, floral arrays, and the like.

United States Patent [72] Inventors Wallace F.Johnson S T. m n P N m E Fm, r a h C m .6. N 6A 6 5 7 n, .nTu SH W am uw 123,765 2/1962Germany............ F ,Cal f. 93705 [zu APPLNQ S5328 837,726 8/1958GreatBmam................ [22] Filed Sept. 27,1968 Primary Examiner-JohnM. Horan [45] Patented May 4,1971 Assistant Examiner-Michael HarrisAtIorney-Huebner & Worrel [54] LIGHTING SYSTEM 7 Claims, 9 Drawing Figs.

PATENEn m 4m SHEU 1 0F 2 WALLACE fr JOHNSON WILL/AM H. T/LsO/v /NVENTORSA TTDRNEVS minimum 4m, 'BLS-Tasso snm a or 2 I WALLACE F. JOHNSON WILLIAM H. T/LSON /Nvf/vro/es Mtg/M A TTORNE V5 LIGHTING SYSTEM BACKGROUNDOF TI-IE INVENTION Theinvention relates to lighting systems and moreparticularly to a lighting system for use in providing decorativelighting for walls, centerpieces, floral arrays, and the like.

The prior art includes a myriad of electrical lighting systems employedin ornamental schemes and decorative devices. Many of these systems areof a portable nature, and are ernployed to provide a desired lightingeffect under given conditions. However, one of the existing problemsencountered in decorative lighting is a lack of systems which aretotally portable and yet do not require open flames orextendedelectrical connections.

l Systems which employ open flames are not suited for use in certainareas, particularly where an open flame is considered a fire hazard.

By the same token, lighting systems which employ electrical energy as ameans for simulating a live or open flame have not met existing needs,simply because a plurality of extended electrical leads are normallyrequired. Further, where batteries have been employed as a source ofelectrical energy for imparting the preferred portability, miniaturelamps have been required as the source of light. ln the use of miniaturelamps, with batteries of a given voltage, consideration must be given tothe expected life span of the lamp, dueto the life factor of thefilament employed, and to the output desired for achieving a givenasthetic effect. For example, assuming that with a normally fixed powersource of 2.5 volts, an output'of 0.12 candle power is desired for acontinuous period of 14 hours, a selected lamp, for conveniencedesignated X-48, characterized by 0.06 amps screw thread base may beemployed. However, assuming that a new system requirement of 0.300candle power for a life of 7 hours is imposed, a new lamp must beemployed. As a practical matter, only a relatively few combinations oflife spans and output factors are possible for commercially availablelamps having a standardized base configuration, that is, any one of thetypes commonlyA referred to as the flanged, screw-threaded and bayonettypes. However, when given the total number of types, presentlycommercially available, with the possible combinations for each type, aneconomic supply of readily available lamp exists. Therefore, asv theoperative requirements are varied for systems heretofore employed,different sockets or receivers, have been required, as each miniaturelamp employed required a receiver which accommodated a change to thetype of lamp being employed. This requirement, of course, is undesired.

'Ihe saine lack of versatility is present in existing lamp enclosuresnormally employed as decorative caps, since the size and shape of theglobes normally vary with each type of miniature lamp employed.Consequently, a complexity factor exists for those systems whichheretofore utilized miniature lamps as the source of light. Furthermore,where the lights are employed in centerpieces or floral arrays, it hasbeen found difficult to provide means for connecting a power source atselected locations within the circuit in order to protect the astheticproperties of the display.

SUMMARY OF THE INVENTION This invention overcomes the aforementioneddifficulties through the use of an improved system including a pluralityof novel circuit components which serve to impart universatilty to thesystem, whereby the system may be readily employed in Another object isto provide a lighting circuit including a plurality of universal circuitcomponents imparting a high degree of versatility to an ornamentallighting system.

Another object is to provide simplified electrical connectors.

Another object is to provide a powerpack capable of being readilyinserted into a circuit.

Another object is to provide a highly versatile circuit which includes aplurality of circuit components and interchangeable members, theversatility of which serves to enhance decorative lighting.

These together with other objects and advantages will become morereadily apparent by reference to the following description and claims inlight of the accompanying drawings.

, a system, including-female receivers, embodying the principles of thepresent invention. v

FIG. 2 is a partially sectioned view of the system shown in FIG l, withthe components thereof assembled in an operative relationship.

` FIG. 3 is a sectioned view of one of the system components shown inFIGS. l and 2.

FIG. 4 is a cross-sectional plan view taken on line 4-4 in FIG. 3.

FIG. 5 is a cross-sectional plan view taken on line 5-5 in FIG. 3.

FIG. 6 is a sectional perspective of a female receiver illustrated inFIG. 5.

FIG. 7 is a bottom view of the assembly shown in FIG. 3. FIG. 8 is across section taken on line 8-8 in FIG. 2 on an enlarged scale.

FIG. 9 is a partially sectioned view of the male connector.

DESCRIPTION OF THE PREFERRED EMBODIMENT A system employing theprinciples of the present invention I housing 16 and are sealed thereinby means of a suitable screw-threaded cap 18. The batteries 17 are ofthe type which, for the sake of convenience, can be described as havinga coaxially disposed positive pole 19.

Mounted on the casing 16, in coaxial. alignment with the positive pole19 is a male connector 20 which, in operation, is

operatively disposed within one of a plurality of universal,

cup-shaped female connectors or receivers 22 concentrically seated in aplurality of caps 24. These receivers are connected with the circuit 14and are adapted to receive the connector 20, in order that the batteries17 may be electrically connected with the circuit. As better shown inFIG. 9, each connector 20 includes positive terminal or contact 26supported in a body of insulating material 28. The contact issubstantially circumscribed by a negative or tubular contact 30 whichterminates in a laterally extended, annular flange 3l. The positivecontact 26 also includes an elongated body or post 32 extending throughthe material 28 and retained in operative disposition therein by meansof any suitable connector, such as a simple nut and washer 34. Inpractice, the nut and washer also serve as a contact for electricallyengaging the positive pole of an associated battery 17.

In order that the male connector 20 Amay serve to complete a circuit toopposite sides of the batteries 17, a conductor 26, formed of a copperstrip, issoldered to the flange 31 of contact 30 and extends intoengagement with a negative pole or contact 37, as normally provided forthe batteries 17. While the strip 36 could be so arranged as to engage anegative contact provided at the opposite end of eachbattery 17, thebatteries presently employed are such as to provide a negative contactin radial disposition with respect to the positive terminal.

Various means may be employed for seating the male connector 20 withinthe end of the casing 16. However, it is preferred that a shoulder 38 beincluded within the casing against which the flange 3l of the contact 30is operatively seated. ln order that the male connector 20 may beretained in a position against the shoulder 38, a suitable compressionspring 40, FIG. 8, is employed to force the flange 31 against theshoulder 38. This spring is electrically conductive and serves to couplethe contact 34 with the battery I7 at its positive terminal 19.

lt is to be particularly noted that all of the female receivers 22 areof a common design, and in addition to serving as a connector for thepowerpack l serve as receivers or lamp sockets for receiving miniaturelamps 42, FlG. 3. Each of the female receivers is of a cup-shapedconfiguration and is fabricated from a flexible polyethylene, or likematerial, which has nonconductive properties and which accommodates aradial expansion and contraction of the receiver. The resiliency of thematerial employed is preferably sufficient for permitting a lamp base ofa lamp 42 to be received therein through its open top.

Bases of a general cylindrical configuration, including thescrew-threaded bases, can be slidingly received in engagement with thentemal surfaces of the receiver or connector 22. Each base is 'grippedor frictionally engaged in a manner sufficient to retain the base in itsoperative position. insertion of a lamp base including bayonets, orlaterally extended pins, is accommodated through the use ofdiametrically opposed, elongated slots 46 which are cut into theinternal surfaces of the connector and parallel its longitudinal axis.Since the base for miniature lamps normally employed are ofapproximately the same diameter, and since the material from which thereceiver 22 is fabricated is of a resilient nature, the base of each ofthe employed lamps may be readily inserted within the receiver,regardless of its configuration, and is readily interchangeable withbases having a different configuration.

` ln order that the male connector 20 be permitted to be electricallycoupled with the receivers 22, the connector is provided with an outsidediameter approximately equal to the outside diameter of a base of aminiature lamp 42. Hence, it should be readily apparent that the maleconnector 20 may be inserted at any appropriate point within the circuiti4.

Each receiver or female connector 22 further includes a conductor strip48 extending parallel to the longitudinal axis of the receiver 22, forcompleting a circuit to the lnegative terminal 37 of batteries 17. lnpractice, the strip 48 is of a generally flexible material, however, inorder to seat the strip within the connector, it is crimped to provide acrimped protrusion 50 which operatively seats against a bottom wallportion l, as is normally provided for the female connector. Anadditional protrusion 52 is formed in the strip which serves to engagethe external surfaces of the bottom wall 51. Hence,

the strip 48 is retained in an operative disposition within theconnector 22 through a cooperative effect of the protrusions 50 and 52.ln order that the strip 48 may be properly retained in its operativedisposition at its opposite end, an additional locking crimp 54 isprovided for engaging the opposed internal and external surfaces of thereceiver near its open end.

Mounted in coaxial alignment within the receiver 22, there is s positiveterminal S6 which is supported by the wall 5 l. The post 56 includes -aradially extended flange or shoulder 58 disposed in operative supportingengagement with the internal surface of the wall 5l and further includesan elongated coaxially aligned post portion 60 extending through thewall. ln practice, a spring 62 is seated in coaxial alignment with theflange and is provided to engage a positive pole of a lamp base or maleconnector inserted therewithin in order to complete the circuit betweenthe post 60 and the inserted positive terminal.

vEach receiver 22 is, in turn, seated in concentric relationship withina cap 24, as hereinbefore mentioned. Each cap includes a tubularinternal surface 64, FIG. 8, and an external terminal portion having atruncated frustoconical surface 66 terminating in an annular base orsupporting shoulder 68. The shoulder 68 defines the supporting endterminal surface of the terminal portion. ln order that the cap 24 maybe mounted in a suitable support, a mounting portion having a surface 70is extended away from the shoulder 68, in a direction opposite to theterminal portion, and is so formed so as to be provided with acylindrical configuration. This portion is in operation received in anysuitable structure, such as, `for example, appropriately formed openings72, illustrated in FIG. l. The terminal portion of each of the caps 24further includes, at its truncated surface, an annular lip 74 whichserves as a retainer for engaging an end surface of the wall of thefemale connectors 22 for retaining them therein, while allowing the baseof a lamp or a male connector to be inserted concentricallytherethrough. Furthermore, each of the caps 24 is provided with anelongated slotted keyway 76. The keyway serves to receive the crimpedportion 54 of the conductor strip 48 as the' connector is seated againstthe lip 74. Hence, it will be appreciated that once the receiver 22 isinserted within the cap 24, any relative rotation therebetween isimpeded through engagement of the surfaces of the keyway 76 with thecrimped portion 54 of the conductor strip 48. ln practice, a lockingring 78 is provided for maintaining the required engagement of thereceiver with the lip 74.

As a practical matter, the opening 72 may be fonned in any suitablestructure for operatively supporting the caps 24. However, for purposesof illustration, a supporting structure 80 is provided as a mountingmember for supporting the com'- ponents of the herein described lightingsystem. Hence, the assembled cap 24 and receiver 22 may be readilymounted, simply by inserting the mounting portion within a suitableopening 72 formed within the supporting structure 80, it is preferredthat the receivers 22 be electrically connected in circuit parallel.However, should it be deemed advisable, the circuit could be wired as aseries circuit.

As better illustrated in FIG. 2, the support 80 further includes anadditional or auxiliary support 8l upon which there is mounted aplurality of male connectors 82. Each connector 82 includes a positivepost 84 which terminates in a contact 86. The post 84 is secured inplace by means of a suitable screw-threaded extension 88, threaded nutor connector 90, which also serves to connect the post 84 with thecircuit. The connector 82 further includes a negative strip 92 whichextends electrically to engage the negative strip 48 for completing thereturn side of the circuit. As each of the male connectors 82 are ofsimilar design and construction, only a single connector is described inthe interest of brevity.

ln order that each of the connectors 82 may be connected in parallel, apair of connector leads 94 are extended therebetween. As a practicalmatter, the male connectors may be connected at their negative strips byany suitable means, such as by soldering the leads 94 thereto, while thelead 94 which connects the positive post 84 may be provided withsuitable connectors which permit the nut to be screw threaded and seatedin an electrical connection of well-known design.

Since the connectors 82 are connected in parallel it will be appreciatedthat the powerpack ll) may be plugged into any one of the receivers 22,while the remaining receivers may be provided with miniature lamps.Therefore, it should bevfully appreciated that the circuit may beenergized from any one of the receivers 22 connected thereto.

lt should be understood that the circuit herein described has utilityseparate and apart from an ornamental lighting system. However, inpractice, the system is particularly suited for use in ornamentallighting for reasons hereinbefore discussed. ln order to achieve thedesired effect, it is often necessary to pro vide each lamp 42 with aminiature cover 96. The cover 96 preferably is formed of a flexiblepolyethylene material and is pigmented to the extent necessary toachieve the desired color when applied over the globe of a given lamp.Since it is intended that globes of the miniature lamps employed be ofdifferent sizes and different configurations, it is necessary that eachof the covers or tips 96 be of such design as to accommodate its usewith any one of the miniature lamps having globes of mutually exclusivesize and configuration. Therefore, the material from which the tip 96 isfabricated is preferably such a's to be capable of withstanding elevatedtemperatures while retaining a desired degree of resiliency. A flexiblepolyethylene material has been found to be quite suitable i for thispurpose. Since it is intended that the lamp 42, in its assembled state,represent a lighted candle, the tip 96 is preferably acuminate tosimulate the tip of a flame when rendered incandescent by anenergization of the filament of the lamp 42.

As can readily be appreciated, each tip 96, particularly the portionsthereof which extends above the top of an associated globe, when the tipis mounted, contains a limited quantity of air. Since a lamp tends togive up heat as it is energized, the air entrapped above the lampexpands as it is heated. This expansion has a tendency to cause the tipsto pop" off the top of the globes. To overcome this, a plurality offlutes 98 have been incorporated along the internal surfaces of thetips. These flutes extend longitudinally from the base of the tip to itsapex and serve as means for dispelling the air as it is heated so thatthe pressure can be relieved and the tip 96 be permitted to remain inplace. Furthermore, the flutes are sufficiently pronounced as to enhancethe universatility of the tip. ln other words, the flutes are deepenough and are sufficient in number as to permit the material that isincluded in the lands between the grooves to be deformed into thegrooves for thus increasingthe effective diameter of the base as a globeis forcibly inserted into the tip.

Conversely, should lthe globe be sufficiently small in diameter as notto require a deformation of the lands, the material of the tip has amemory sufficient to permit the lands to remain erect and thus engagethe surfaces of the globe about which the ltip is seated.

Where total flexibility is preferred, the'supporting structure 80 may bereadily eliminated, so that the wires or leads 94 are permitted to serveas supports for the male connectors 82 as the candles are strung" into adesired and coupled relationship. While not shown, it is entirelyfeasible, to connect the post 60 of each of the receivers 22 with one ofthe leads 94, while the other lead is connected with the strip Thisconnection may be made in any suitable manner, suchas by soldering, forexample. lf the leads 94 are employed without the male connectors 82,increased flexibility may be realized. Therefore, while the maleconnectors 82 have been illustrated, it is entirely feasible to connectthe circuit components without requiring any rigid construction as maybe the case in the trimming of Christmas trees, floral wreaths and vthelike.

While not a part of the present invention it should be readilyappreciated that each of the powerpacks 10, with the male connectors 20fixed thereto, may be inserted into an electrical battery chargingcircuit having a plurality of receivers 22 connected therein. ln thismanner, each of the powerpacks may be readily stored when not in use andthus prepared or recharged for the next use at a later date, all withoutrequiring a removal of the batteries and while achieving the rechargingof batteries while they are retained within the casing l0.

ln operation, it may be assumed that a plurality of the components havebeen assembled into a plurality of structures each including a truncatedfrustoconical cap 24, having mounted therein a receiver 22 into whichhas been seated a miniature lamp 42 encased in a flame-shaped tip 96.The structures are positioned in a manner dictated by decorators. Eachof the candlelike structures are supported in any suitable means such asthe rigid support 78 into which the caps 24 have been inserted. However,should it be desired, a simple clip can be applied to each of thestructures in order to support the candlelike member or component inoperative position. The components are then connected, through leads 94,in a parallel circuit arrangement. [nto one of the receivers supportedby cap 24 is inserted the powerpack 10. The male lconnector of thepowerpack engages the contact 62, while the negative ycontact of thepowerpack engages the strip 48, so that a circuit is completed to thecandlelike components. Once the circuit has been completed, the battery17 applies the necessary voltage across each of the receivers 22 inorder to cause a miniature lamp 42 retained therein to become energizedand be rendered incandescent. Should it be desired to interchange any ofthe miniature lamps 42 with different lamps having different bases, suchis readily facilitated through the employment of the universalconnectors or receivers 22 without requiring a change of the particularreceiver employed for receiving the lamp. 4

ln view of the foregoing, it should be readily apparent that asimplified circuit, having a plurality of interchangeable circuit andsystem components, has been provided which serve to enhance decorativeoperation and involved in creating displays having certain astheticvalue.

Although the invention has been herein shown and described in what isconceived to be the most practical and preferred embodiment, it isrecognized that departures may be made therefrom within the scope of theinvention, which is not to be limited to the details disclosed hereinbut is to be accorded the full scope of the claims so as to embrace anyand all equivalentdevices and apparatus.

We claim:

l. A lighting system comprising:

a. an electrical circuit including therein a plurality of electricallyconnected, commonly configured universal receivers, each receiverincluding a cylindrical body formed of a resilient, insulating material,a negative terminal having a terminal strip extending along the innerwall of the receiver, and a positive terminal mounted in concentricrelationship with the body of the receiver;

b. an integrated powerpack including a source of electrical energy andan electrical terminal probe electrically coupled with the source andseated in one receiver of the plurality of receivers electricallyconnecting said circuit with said source of electrical energy; and

. a plurality of integrated miniature lamps, each lamp including a globeand a depending base operatively seated in a selected receiver of theplurality of receivers and electrically coupled with said circuitthrough the receiver so that electrical energy simultaneously is appliedto said plurality of integrated miniature lamps from said source throughsaid probe.

2. The system of claim l, wherein said terminal probe includes acylindrical negative terminal having an outwardly directed mountingflange and a concentric positive terminal supported within the negativeterminal by means including an insulating material whereby the terminalprobe may randomly be inserted into a selected receiver of saidplurality of receivers for establishing an electrical contact betweenthe negative terminal of the terminal probe and the terminal strip ofthe selected receiver, and the positive terminal of the terminal probeand the positive terminal of the selected receiver, to complete anelectrical circuit between the source and the negative and positiveterminals of the plurality of receivers.

3. The combination of claim 2, wherein the system further includes a caphaving a truncated frustoconical external surface and a cylindricalinternal surface for supporting said receivers in a mannerr such thateach receiver is adapted alternately to receive a male connector and aminiature lamp.

4. Thecombination of claim 3 further including a flameshaped capoperatively seated on the globe of each of said lamps, being formedof aresilient material, and including a plurality of longitudinally alignedflutes adapted to facilitate mounting of the cap and to dispel heatedair as voltage is applied to said lamps.

' 5. The system of claim 1 wherein each of said lamps further includes atranslucent ornamental cap encompassing the globe of each of saidminiature lamps.

6. A lighting fixture including:

a. a supporting capV having an external surface including a cylindricalbody terminating in a shoulder adapted to support the cap in selectedmounting structure, a terminal portion having a truncated frustoconicalconfiguration extending away from the shoulder, and a cylindricalinternal surface;

b. a universal female receiver having a cylindrical wall a positiveterminal concentrically disposed within the receiver including aterminal post extending through the bottom of said receiver, and aspringlike portion concentrically arranged within the receiver andextended in coaxial alignment with the post;

. a miniature lamp seated in said receiver and connected across saidterminals; and

. a decorative cap having a plurality of longitudinally directed flutesbeing formed of a flexible material and having a flame-shapedconfiguration encompassing the globe of said lamp.

7.A lighting fixture including:

a. a supporting cap having an external surface' including a cylindricalbody terminating in a shoulder adapted to support the cap in selectedmounting structure, a terminal portion extending away from the shoulder,and a cylindrical internal surface;

b. a universal female receiver of a cuplike configuration having a'cylindrical wall formed of a resilient flexible material and providedwith means defining within the wall diametrically opposed, elongatedslots and including a negative terminal comprising a conductor stripextended along one longitudinal segment of the wall beyond the oppositeends thereof, and having arcuately deformed seg?l ments coupling saidstrip to the receiver;

c. a positive terminal concentrically disposed within the receiverincluding a terminal post extending through the bottom of said receiver,and a springlike portion concentrically arranged within the receiver andextended in coaxial alignment with the post; andd, a miniature lampseated in said receiver and connected across said terminals.

1. A lighting system comprising: a. an electrical circuit includingtherein a plurality of electrically connected, commonly configureduniversal receivers, each receiver including a cylindrical body formedof a resilient, insulating material, a negative terminal having aterminal strip extending along the inner Wall of the receiver, and apositive terminal mounted in concentric relationship with the body ofthe receiver; b. an integrated powerpack including a source ofelectrical energy and an electrical terminal probe electrically coupledwith the source and seated in one receiver of the plurality of receiverselectrically connecting said circuit with said source of electricalenergy; and c. a plurality of integrated miniature lamps, each lampincluding a globe and a depending base operatively seated in a selectedreceiver of the plurality of receivers and electrically coupled withsaid circuit through the receiver so that electrical energysimultaneously is applied to said plurality of integrated miniaturelamps from said source through said probe.
 2. The system of claim 1,wherein said terminal probe includes a cylindrical negative terminalhaving an outwardly directed mounting flange and a concentric positiveterminal supported within the negative terminal by means including aninsulating material whereby the terminal probe may randomly be insertedinto a selected receiver of said plurality of receivers for establishingan electrical contact between the negative terminal of the terminalprobe and the terminal strip of the selected receiver, and the positiveterminal of the terminal probe and the positive terminal of the selectedreceiver, to complete an electrical circuit between the source and thenegative and positive terminals of the plurality of receivers.
 3. Thecombination of claim 2, wherein the system further includes a cap havinga truncated frustoconical external surface and a cylindrical internalsurface for supporting said receivers in a manner such that eachreceiver is adapted alternately to receive a male connector and aminiature lamp.
 4. The combination of claim 3 further including aflame-shaped cap operatively seated on the globe of each of said lamps,being formed of a resilient material, and including a plurality oflongitudinally aligned flutes adapted to facilitate mounting of the capand to dispel heated air as voltage is applied to said lamps.
 5. Thesystem of claim 1 wherein each of said lamps further includes atranslucent ornamental cap encompassing the globe of each of saidminiature lamps.
 6. A lighting fixture including: a. a supporting caphaving an external surface including a cylindrical body terminating in ashoulder adapted to support the cap in selected mounting structure, aterminal portion having a truncated frustoconical configurationextending away from the shoulder, and a cylindrical internal surface; b.a universal female receiver having a cylindrical wall formed of aresilient flexible material and provided with means definingdiametrically opposed, elongated slots and being provided with a cuplikeconfiguration, and including a negative terminal comprising a conductorstrip extended along one longitudinal segment of the wall and beyond theopposite ends thereof, and having arcuately deformed segments couplingsaid strip to the connector; c. a positive terminal concentricallydisposed within the receiver including a terminal post extending throughthe bottom of said receiver, and a springlike portion concentricallyarranged within the receiver and extended in coaxial alignment with thepost; d. a miniature lamp seated in said receiver and connected acrosssaid terminals; and e. a decorative cap having a plurality oflongitudinally directed flutes being formed of a flexible material andhaving a flame-shaped configuration encompassing the globe of said lamp.7. A lighting fixture including: a. a supporting cap having an externalsurface including a cylindrical body terminating in a shoulder adaptedto support the cap in selected mounting structure, a terminal portionextending away from the shoulder, and a cylindrical internal surface; b.a universal female receiver of a cuplike configuration having acylindrical wall formed of a resilient flexible material and providedwitH means defining within the wall diametrically opposed, elongatedslots and including a negative terminal comprising a conductor stripextended along one longitudinal segment of the wall beyond the oppositeends thereof, and having arcuately deformed segments coupling said stripto the receiver; c. a positive terminal concentrically disposed withinthe receiver including a terminal post extending through the bottom ofsaid receiver, and a springlike portion concentrically arranged withinthe receiver and extended in coaxial alignment with the post; and d. aminiature lamp seated in said receiver and connected across saidterminals.